007-使用python统计代码行数，空行以及注释

f = open(‘/Users/michael/test.txt‘, ‘r‘)

with open(‘/path/to/file‘, ‘r‘) as f:
    print(f.read())

for line in f.readlines():
    print(line.strip()) # 把末尾的‘\n‘删掉

def linecount_1():
    return len(open(‘data.sql‘).readlines())#最直接的方法

def linecount_2():
    count = -1 #让空文件的行号显示0
    for count,line in enumerate(open(‘data.sql‘)): pass 
    #enumerate格式化成了元组,count就是行号,因为从0开始要+1
    return count+1

def linecount_3():
    count = 0
    thefile = open(‘data.sql‘,‘rb‘)
    while 1:
        buffer = thefile.read(65536)
        if not buffer:break
        count += buffer.count(‘\n‘)#通过读取换行符计算
    return count

str.strip([chars]);

str.startswith(substr, beg=0,end=len(string))

# conding:utf-8

count = 0
sum = 0

catalog = open(r"D:\Users\sky\PycharmProjects\untitled2\dict.py")

t = len(open(r"D:\Users\sky\PycharmProjects\untitled2\dict.py").readlines())　　#统计行数

for line in catalog.readlines():
    line = line.strip()     #去掉每行头尾空白
    print(line)
    if line == "":
        count += 1
    if line.startswith("#"):    #startswith() 方法用于检查字符串是否是以指定子字符串开头，如果是则返回 True，否则返回 False
        sum += 1

print("统计的文件行数为：%d行" %t)
print("统计文件的空行数为：%s" %count)
print("统计的注释行数为：%s" %sum)